can you please tell me what device they are coming from? The async port is a console port. Once you find the NAS ip address,please get it physically checked what is connected on Console port, even if we have a console cable connected remove it. It seems like there is something that is causing a noise on console port (tty0).
On the NAS device, please use "show line" and check if there is noise appearing on the console port.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
[toc:faq]Introduction:This document describes details on how NAT-T
works.Background:ESP encrypts all critical information, encapsulating
the entire inner TCP/UDP datagram within an ESP header. ESP is an IP
protocol in the same sense that TCP and UDP are I...